Collective phase transitions in confined fish schools

• 成果类型: Article
• 署名作者: Huang, Chenchen; Ling, Feng; Kanso, Eva
• 署名单位: University of Southern California; University of Southern California
• 刊物名称: PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
• ISSN/ISSBN: 0027-10871
• DOI: 10.1073/pnas.2406293121
• 发表日期: 2024-10-29
• 关键词: behavior; motion

摘要

The collective patterns that emerge in schooling fish are often analyzed using models of self-propelled particles in unbounded domains. However, while schooling fish in both field and laboratory settings interact with domain boundaries, these effects are typically ignored. Here, we propose a model that incorporates geometric confinement, by accounting for both flow and wall interactions, into existing data driven behavioral rules. We show that new collective phases emerge where the school of fish follows the tank wall or double mills. Importantly, confinement induces repeated switching between two collective states, schooling and milling. We describe the group dynamics probabilistically, uncovering bistable collective states along with unintuitive bifurcations driving phase transitions. Our findings support the hypothesis that collective transitions in fish schools could occur spontaneously, with no adjustment at the individual level, and opens venues to control and engineer emergent collective patterns in biological and synthetic systems that operate far from equilibrium.